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检索条件"作者=Chen Jing institute of applied physics and computational mathematics"

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Numerical Simulation of Penetration into Concrete Target Using SPH-Lagrange coupling Method

Numerical Simulation of Penetration into Concrete Target Usi...

引用

第三届亚太国际工程中计算方法学术会议ICOME2009暨第九届全国工程中边界元、无网格等数值方法学术会议

作者： Huang Xicheng1, Yan Yixia1, Zong Weizhou1, Hao Zhiming1, chen Yuze1, Zhu Jianshi2 1 institute of Structural Mechanics, China Academy of Engineering physics, Mianyang,621900, China 2 Beijing institute of applied physics and computational mathematics, Beijing,100008, China

In analaysis of dynamic fracture of concrete and penetration performance of projectiles, the SPH-Lagtrange coupling method is a useful and powerful approach. This work demonstrates the application of both numerical simulation by SPH and empirical equation of ConWep in predicting the penetration of a concrete target by an ogive-nosed projectile. The results from the experiment performed by Buzaud et ac are used as a benchmark for comparison. In the numerical simulations the 3.0-caliber radius-head steel ogival-nose projectiles with different mass and different diameter are fired against cylindrical concrete target with a striking velocities of 292, 276 and 510 m/s. In the simulation the smooth particles hydrodynamics SPH-Lagrange coupling method is applied to predict the maximum depth of penetration(DoP). For calculation of DoP and response of projectile the SPH-Lagrange method can give satisfactory results.

关键词： numerical simulation, SPH, penetration, concrete

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Ab initio study of charged vacancy in YAlO3 single crystal

Ab initio study of charged vacancy in YAlO3 single crystal

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9th International Conference on Computer Simulation of Radiation Effects in Solids

作者： Jun chen~*,Yun Xu,Dong Quan chen Laboratory of computational physics,institute of applied physics and computational mathematics,Beijing,China,100088

YAlO（YAP） is a very important solid-state laser host material[1-3].The optical properties of YAP with rare-earth dopants have been an important research task in order to improve the material processing and *** has b... 详细信息

关键词： Vacancy Electronic structure Optical transition Ab initio method YAP

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Molecular High-Harmonic Generation

Molecular High-Harmonic Generation

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2006年全国强场激光物理会议

作者： chen jing institute of applied physics and computational mathematics

＜正＞We perform a nonperturbative theoretical investigation of the high harmonic generation（HHG）spectrum of diatomic molecular systems in intense short-pulse laser *** wavelet transform and Wigner distribution are ...

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The origin of the double-peak structure in longitudinal M omentum distribution for single ionization of He atom in strong laser field

The origin of the double-peak structure in longitudinal M om...

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2006年全国强场激光物理会议

作者： chen jing institute of applied physics and computational mathematics

＜正＞The single ionization of He atom by intense linearly polarized laser field in the tunnelling regime is studied by S-matrix *** only the first term of the expansion of S-matrix is considered and time,spatial dist...

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COUPLED FLUID-STRUCTURE ANALYSIS OF EXPLOSIVE DRIVEN FRAGMENTATION OF CYLINDRICAL SHELL

COUPLED FLUID-STRUCTURE ANALYSIS OF EXPLOSIVE DRIVEN FRAGMEN...

引用

The 7th International Conference on Shock and Impact Loads on Structures

作者： Xicheng Huang~*,institute of Structural Mechanics,CAEP,China Yuze chen,institute of applied physics and computational mathematics,China Yuanshu Wang,institute of applied physics and computational mathematics,China

The accurate numerical simulation of the dynamic response and failure of a structure to an explosive detonation product is a complex problem,involved with coupled fluid-solid description and dynamic failure of *** paper presents the coupled fluid-structure numerical simulations of high explosives detonated within cylindrical *** the analysis,The high explosive detonation and expansion are modeled using a high resolution Euler solver,while the shell modeled using a Lagrangian type of *** Euler solver is dynamically coupled in space and time with a Lagrange solver that describes the response of cylindrical *** simulation of failure process,the Grady spall model,JC failure model and Gurson mesodamage model are applied to simulate the damage and fracture process of cylinders subjected to internal explosive *** calculations show that there are two types of failure modes in OFHC cylinders,they are spallation and shear fracture. The spall occurs at early stage,due to radial tension(parallel tension),while shear fracture happens due to shear bands and necking induced by loop tension(vertical tension) of shells after two parts formed by *** spall occurs only in cylinders with thick *** thin cylindrical shells the shear fracture predominates in expanding process,and periodicity of instability *** dynamic fracture of ductile materials,application of Gurson modes gives reasonable numerical simulation of shear band nucleation,evolution and local necking fractures.

关键词： explosive fragmentation numerical simulation cylindrical shell coupled fluid-solid

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Dynamical behaviors of spiral waves driven by complex signals

Dynamical behaviors of spiral waves driven by complex signal...

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第五届国际非线性力学会议

作者： Guo-yong Yuan~1,Shi-ping Yang~1,Shi-gang chen~2 (1.Department of physics,Hebei Normal University,Shijiazhuang 050016,China 2.institute of applied physics and computational mathematics,Beijing 100088,China)

Spiral waves observed in excitable and self-oscillatory media exist extensively in *** this paper,dynamical behavior and tip motion of spiral waves driven by complex external signals were *** is well known that resonant and stochastic resonant phenomena of spiral waves can happen in a system subjected to simply periodic or noisy external force,but dynamics of spiral waves driven by complex external forces are more complex than periodic signals and simpler than noise,which have been rarely *** results in this paper show that drift and compound motion of spiral waves with complex motion of tip can appear in the system subjected to complex force.

关键词： Dynamical behaviors of spiral waves driven by complex signals

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Collapse of spherical shells subjected to external pressure

Collapse of spherical shells subjected to external pressure

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第五届国际非线性力学会议

作者： Xi-cheng Huang~1,Yu-ze chen~1,Jian-shi Zhu~2 (1.institute of Structural Mechanics,China Academy of Engineering physics,Mianyang 621900, Sichuan Province,China 2.Beijing institute of applied physics and computational mathematics,Beijing 100000,China)

In this paper we focus on collapse of spherical shells subjected to external pressure. Firstly,the comparison was made between spherical and one-dimensional strain wave *** difference and similarity were *** an analyt... 详细信息

关键词： Collapse of spherical shells subjected to external pressure

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Calculation of Failure Locus from Tension Tests of Notched Specimen

Calculation of Failure Locus from Tension Tests of Notched S...

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第一届工程科学与力学中的计算方法国际会议

作者： Xicheng Huang , Yuze chen , and Jianshi Zhu Structural Mechanics institute of China Academy of Engineering physics Beijing institute of applied physics and computational mathematics

In tests determining the failure locus of materials, the smooth and nocthed bar specimen are often used. During smooth and notched bar tension test, especially from necking to fracture, the stress triaxialities vary, do not keep constant. As a basic function, the widely used failure locus of materials should characterize the failure strian under different stress triaxialities under simple loading, not include effects of deformation path. This paper presents a calculation method of failure locus from tension tests of smooth and notched specimen based on ductile damage analysis in combination with numerical simulation and optimization algorithm

关键词： failure locus notched specimen tension test stress triaxiality numerical simulation

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A Compact C-Band Magnetically Insulated Line Oscillator

A Compact C-Band Magnetically Insulated Line Oscillator

引用

The Fourth Asia-Pacific Conference on Environmental Electromagnetics

作者： Guo Yanhua, Fan Zhikai, Dong Zhiwei, Zhou Haijing, He Hu, chen Daibing institute of applied Electronics, Chinese Academy of Engineering physics, Mianyang, Sichuan, 621900, China. institute of applied physics and computational mathematics, Beijing, 100088, China.

The magnetically insulated line oscillator (MILO) is a high power microwave (HPM) pulsed device, potentially of gigawatt power, that combines the technologies of magnetically insulated electron flow with a slow wave structure (SWS) . This combination makes the tube a device capable of operating over a wide voltage range. Our concern is to design a compact experimental setup. Using the theoretical and experimental results as guides, a novel RF choke and a beam dump disk have been introduced into the MILO. In experiments, high power microwave of the TM01 mode is generated from the device with a frequency range of 3.70～3.72GHz and a power level of above 500MW, when the diode voltage is 400～430kV and the beam current is 30～33kA. The experimental results are in agreement with the computation values.

关键词： high power microwave, slow wave structure, PIC simulation

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Numerical Simulation of Hydrodynamic Hat Shear Experiments

Numerical Simulation of Hydrodynamic Hat Shear Experiments

引用

The second Asia-Pacific International Conference on computational Methods in Engineering（ICOME2006）

作者： Xicheng Huang 1, Yuze chen 1, Jianshi Zhu 2 1 institute of Structural Mechanics, China Academy of Engineering physics, Mianyang, 621900 China 2 Beijing institute of applied physics and computational mathematics, Beijing, 100000 China

Tungsten alloys are often used as kinetic energy penetrators because of their high density and high strength, and the formation of adiabatic shear banding as their common dynamic failure mode while subjected to impact loading. In this paper, the hydrodynamic hat shear experiments on tungsten alloys performed by Couque are simulated with Abaqus/Expicit code. The relationship between impact velocity and ASB length is presented. The results are helpful to understand the dynamic failure of tungsten alloys.

关键词： adiabatic shear banding, tungsten heavy alloys, numerical simulation, hydrodynamic hat specimen

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